复杂条件下深井软岩开拓巷道变形破坏分析  

Analysis on the Deformation of the Surrounding Rock of Development Tunnel under the Complex Conditions on Deep Tunnels

作　　者：李男男[1,2] 顾士坦[1,2] 于凤海[1,2] 蒋邦友[1,2] 

机构地区：[1]矿山灾害预防控制教育部重点实验室 [2]山东科技大学资源与环境工程学院

出　　处：《金属矿山》2012年第7期45-49,共5页Metal Mine

基　　金：国家重点基础研究发展计划(973计划)项目(编号:2010CB226805-02);中国博士后科学基金项目(编号:20100471561);山东科技大学科研创新团队支持计划项目(编号:.2010KYTD105)

摘　　要：某矿-650 m开拓大巷地质条件比较复杂,且受到东西相邻工作面回采影响,巷道围岩发生了严重的变形破坏。现场围岩探测分两步:前期围岩松动圈探测和后期围岩钻孔可视化探测,得到了松动圈的范围及围岩裂隙发育情况,同时对比得出围岩破坏范围向深部延伸,松动圈进一步扩大,甚至出现松动破坏现象。根据深井巷道围岩变形规律及其力学特性,在软岩巷道围岩稳定控制理论的基础上,建立巷道受力模型并分析了大巷周围受力关系,提出了倾斜工作面倾向的"传递梁"结构和两工作面顶板垮落后大巷顶板所形成的"局部块"结构。结合现场钻孔可视化探测结果及现场观测,总结出大巷变形特点及造成巷道围岩变形的原因,为大巷二次支护提供理论依据和科学指导,同时为类似矿井开拓巷道的支护提供借鉴。-650 development tunnel in a mine with the more complex geological condition was affected by the nearby coal face of mining,and severe deformation of the surrounding rock has occurred.Two detection steps were divided that the detection of prophase fractured rock zone and late drilling visualization,the broken-rock circle and fracture development were obtained,comparative analysis derived the surrounding rock mass range extension to the deep,to be large circle,even to occur loose destruction phenomenon.Based on deep surrounding rock deformation laws and its mechanical properties,in surrounding rock stability control theory of the soft rock tunnel,to create tunnel force model and to analysis the force relationships,on which ＂Pass beam＂ structure in slop direction of face and ＂Part block＂ structure of roof after two faces roof caving.Combing with drilling detection results and observation phenomenon,summed up the tunnel deformation characteristics and result in deformation of surrounding rock.It provides science guidance and theoretical basis in secondary support,and was referenced of the similar ones.

关 键 词：大变形 采动影响 软岩巷道 松动圈 二次支护 

分 类 号：TD353[矿业工程—矿井建设]